Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc10f7c0f8f5e790…

MALICIOUS

PDF

29.4 KB Created: 2021-07-21 13:21:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 04458057bf50b85396589498f0165aa4 SHA-1: 0487de0f43a96cb6829ed30814a5ca736fe98bad SHA-256: fc10f7c0f8f5e79026b196960b8aa2370b10f0f18fc23958eb8600edbd1c5da2
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a malicious redirector lure, specifically advertising a 'free generator / game hack' for Minecraft. The embedded URL, http://netcdn.tw/app/479516143/minecraft-mobile-free-game-hack, is flagged as malicious infrastructure. The document body also contains text related to Minecraft and a call to action to download, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0556

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/479516143/minecraft-mobile-free-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000020c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C4 22396 bytes
SHA-256: 264e8e9f3cb0f6b0f989354de9f0451bdf7987515774443a66eab47246c17282
font_01_sfnt_off0000526e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x526E 17944 bytes
SHA-256: ce10a2b2c496b69fcf76f31cd4916c063e1dd9befde4055646c3ea28f41e8e8e